## Algorithm

Problem Name: Functions in C

In this HackerRank Functions in C programming problem solution,In this challenge, you will learn simple usage of functions in C. Functions are a bunch of statements grouped together. A function is provided with zero or more arguments, and it executes the statements on it. Based on the return type, it either returns nothing (void) or something.

A sample syntax for a function is

return_type function_name(arg_type_1 arg_1, arg_type_2 arg_2, ...) {

...

...

...

[if return_type is non void]

return something of type `return_type`;

}

For example, a function to read four variables and return the sum of them can be written as

int sum_of_four(int a, int b, int c, int d) {

int sum = 0;

sum += a;

sum += b;

sum += c;

sum += d;

return sum;

}

+= : Add and assignment operator. It adds the right operand to the left operand and assigns the result to the left operand.

a += b is equivalent to a = a + b;

Write a function int max_of_four(int a, int b, int c, int d) which reads four arguments and returns the greatest of them.

Note

There is not built in `max` function in C. Code that will be reused is often put in a separate function, e.g. `int max(x, y)` that returns the greater of the two values.

Input Format

Input will contain four integers - a, b, c, d , one on each line.

Output Format

Print the greatest of the four integers.
Note: I/O will be automatically handled.

Sample Input

``````3
4
6
5
``````

Sample Output

``````6
``````

## Code Examples

### #1 Code Example with C Programming

```Code - C Programming```

``````
#include <stdio.h>

#define max(a,b) (a>b?a:b)

int max_of_four(int a,int b,int c,int d){

return max(a,max(b,max(c,d)));
}

int main() {

int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
int ans = max_of_four(a, b, c, d);
printf("%d", ans);
return 0;
}
``````
Copy The Code &

Input

cmd
3 4 6 5

Output

cmd
6